FROM TH2F
constant
0.024013523626798507+-0.01589886576728913
chi2/ndof = 0.0385781171013142
plane
0.10899084865599096+-0.10891087302754134
invpt slope = 0.011611017142040247+-0.012489813792579503
theta slope = -0.0827996670877596+-0.08491367229975286
chi2/ndof = 0.01772794933046338
from tgraph2D
constant
0.059193330066817665+-0.006531847951112388
chi2/ndof = 0.0042665037632028694
plane
0.21207670461752431+-0.02167870596606484
invpt slope = 0.019110956547893427+-0.0031208122298748424
theta slope = -0.17605643034737864+-0.017991408396024953
chi2/ndof = 0.001806112607651418